SignalJ2DirectionDescriptionSignalJ1
CTS
DSR
J2-D
J2-E
——>
——>
Twisted pair no.
2
O_RTS/CTS+
O_DTR/DSR+
J1-8
J1-7
RLSD
GND
J2-F——>
—
Twisted pair no.
1
B_DCD/DCD+
GND
J1-6
J1-19
LT
GND
J2-K
J2-B
<——
—
Twisted pair no.
3
B_LL/LL+
GND
J1-13
J1-26
SD+
SD-
J2-P
J2-S
<——
<——
Twisted pair no.
5
I_RxD/TxD+
I_RxD/TxD-
J1-5
J1-18
RD+
RD-
J2-R
J2-T
——>
——>
Twisted pair no.
9
O_TxC/RxD+
O_TxD/RxD-
J1-1
J1-14
SCTE+
SCTE-
J2-U
J2-W
<——
<——
Twisted pair no.
6
I_RxC/TxCE+
I_RxC/TxCE-
J1-4
J1-17
SCR+
SCR-
J2-V
J2-X
——>
——>
Twisted pair no.
8
O_TxCE/RxC+
O_TxCE/RxC-
J1-2
J1-15
SCT+
SCT-
J2-Y
J2-AA
——>
——>
Twisted pair no.7B_TxC/TxC+
B_TxC/TxC-
J1-3
J1-16
The following table lists the X.21 DTE Cable Pinouts cable pinouts. Arrows indicate signal direction.
Any pin not referenced is not connected.
Note
Twisted pairs 4, 6, and 9 are not used.
Note
Table 54: X.21 DTE Cable Pinouts (DB-15 Male Connector)
SignalJ2DirectionDescriptionSignalJ1
---Local
connections
MODE_1
MODE_0
J1-21
J1-24
Shield
GND
J2-1—Shield--
Transmit+
Transmit-
J2-2
J2-9
——>
——>
Twisted pair no.
5
O_TxD/RxD+
O_TxD/RxD-
J1-1
J1-14
Cisco ASR 9000 Series Aggregation Services Router SIP and SPA Hardware Installation Guide
80
Overview: Cisco ASR 9000 Series Router Shared Port Adapters
4-Port Serial Interface SPA Cables, Connectors, and Pinouts
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